Ettore Bugatti's personal car ( a birthday present from his son) an Atalante Type 57-C, for auction at Bonham's at Goodwood

In 1938 the Bugatti factory workers prepared a very special birthday present for Ettore Bugatti; a unique Type 57 C. The design of the one-off Coupe was penned by Jean Bugatti. The factory cherished 'Le Patron's' personal Bugatti and carefully protected it during the War. Even after Ettore's death in 1947, the car remained in the hands of the works.

Info and photos from http://www.ultimatecarpage.com/car/4185/Bugatti-Type-57-C-Coupe-Aerodynamique.html